CG Measuring Scale

The CG Measuring Scale is an accurate digital scale which shows the exact location of the centre of gravity location in millimetres from the wing leading edge, plus the model’s weight in grams. Ideal for F3K, F5J, F3J, F3F, F3B, F3B, F3F and all similarly sized model aircraft.

The centre of gravity scale comes with a 9 V battery which supplies the energy to this complex device. The scale consists of the main unit holding the scales, a 3D printed cradle to hold the model, and a microcomputer with LCD display to output the info.

Available in two versions as shown below. We recommend the Small 3 Kg version for most modellers as perversely it has a slightly lager max fuse size.

During boot up the battery voltage is displayed. Occasionally new 9V batteries are too high initially in which case the display is incorrect until the voltage drops. The battery is changed by unscrewing the plate near the switch.

CG Measuring Scale Types
Size	Small 3Kg	Regular 4 Kg
Target model	F3K, DLG, Mini DLG, F5J	F3J, F3F, F3B
Max model weight	3 Kg	4 Kg
Max rearward CG	120 mm	145 mm
Min wing chord	132 m	155 mm
Max fuse width under wing	65 mm	52 mm
Max fuse depth under wing	65 mm	65 mm

Technical characteristics:
Measuring range: 0 to 3 or 4 kg
Display: LCD 65x16mm, display on 2 lines
Power supply: 9v battery (included)
Dimensions CG scale (LxWxH): 173x148x140mm approx.
Dimensions display case (LxWxH): 85x40x20mm approx.
Weight of the CG scale: 410g approx.

How to use it:

1) Set the CG balance switch to ON

2) Wait for the display on the tare screen (GR: 0000)

3) Place the glider on the 4 pins, fuselage well centred in the supports and leading edges bearing against the stops

4) Read the weight of the model (g) and the position of centre of gravity (mm)